/Engine/Source/Runtime/CoreUObject/Public/UObject/LinkerLoad.h
Attempts to find the index for the given class object in the import list and adds it + its package if it does not exist
bool CreateImportClassAndPackage ( [FName](API\Runtime\Core\UObject\FName) ClassName, [FName](API\Runtime\Core\UObject\FName) PackageName, [FPackageIndex](API\Runtime\CoreUObject\UObject\FPackageIndex) & ClassIdx, [FPackageIndex](API\Runtime\CoreUObject\UObject\FPackageIndex) & PackageIdx )